push with interpolated variable

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: push with interpolated variable by borisz (Canon) on Jan 19, 2005 at 19:26 UTC
The first one push $value into the array. The second push a string containing $value with a trailing space into the array. Boris	[reply]
Re: push with interpolated variable by holli (Abbot) on Jan 19, 2005 at 19:24 UTC
`push (@array, $value);` [download] is the same as `push @array, "$value";` [download] But when you say `push @array, "$value ";` [download] you add a space at the end of $value. holli, regexed monk	[reply] [d/l] [select]
Re^2: push with interpolated variable by mpeters (Chaplain) on Jan 19, 2005 at 19:26 UTC
Also, by saying `"$value"` you are making perl treat `$value` in string context when it might not be at string but a number, or a boolean, or a reference, or an object, etc.	[reply] [d/l] [select]
Re^2: push with interpolated variable by Anonymous Monk on Jan 20, 2005 at 10:20 UTC
`push (@array, $value);` [download] is the same as `push @array, "$value";` [download] It's not. `#!/usr/bin/perl use strict; use warnings; my (@array, $value); @array = ("foo"); $value = []; push(@array, $value); $array[-1][0] = "bar"; print $array[-1][0], "\n"; @array = ("foo"); $value = []; push @array, "$value"; $array[-1][0] = "bar"; print $array[-1][0], "\n"; __END__ bar Can't use string ("ARRAY(0x818427c)") as an ARRAY ref while "strict re +fs" in use` [download]	[reply] [d/l] [select]
Re^3: push with interpolated variable by holli (Abbot) on Jan 20, 2005 at 12:13 UTC
Indeed. I assumed $value contains a simple scalar (a string or a number). If $value contains a reference then "$value" is stringified. Thanks for the clarification, i never thought about that. holli, regexed monk	[reply]